GPU-Based Real-time N-1 AC Power Flow Algorithm With Preconditioned Iterative Method

With the expansion of scale of power system, in order to satisfy the real-time and accuracy requirements of N-1 security, a GPU based real-time N-1 AC power flow algorithm with preconditioned iterative method was proposed. This algorithm concatenated independent power flow problems into one. The concatenated Jacobi matrix was formed by parallel processing, and the linear equations were solved by the direct method or the iterative method according to the scale of equations. The iterative method was designed and parallelly processed based on preconditioning method ILU(0) and Krylov theory. The case analysis shows that, the proposed algorithm has high efficiency, high accuracy and needs small memory footprint, which could be applied to engineering practice.